A stable synthetic fluid, free from water, for applications where bearing pressures are high and where temperatures repeatedly exceed 140 degrees Fahrenheit. It has a high flash point, is noncorrosive and nontoxic, and has additives to prevent wear. Excludes HYDRAULIC FLUID, NONCOMBUSTIBLE; HYDRAULIC FLUID, NONPETROLEUM BASE, AIRCRAFT; and BRAKE FLUID, AUTOMOTIVE.